Lamp



FIG. 1 is a front perspective view of the invention illustrating my design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top elevation view thereof; and,

FIG. 7 is a bottom elevation view thereof.

The broken lines shown in FIG. 7 illustrate unclaimed portions of the article and form no part of the claimed design. 

The ornamental design for a lamp, as shown and described. 